science - sorting materials into groups

Class 6 - Science

Sorting Materials into Groups

Q&A
Question:

Why is water important for our body?

Answer:

Water can dissolve a large number of substances, so it is needed by the body. It is also major part of our body cells.



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Questions and Answers


Sorting Materials into Groups - Questions
1.

Suggest two bases on which we can group objects.


Answer
2.

Name two objects which are made from opaque materials.


Answer
3.

Write two substances which are made from leather.


Answer
4.

Why is a tumbler not made with a piece of cloth?


Answer
5.

What are the similarities between iron, copper and aluminium?


Answer
6.

Metals have lustre (shine). Give reason why some metal articles become dull and loose their shine.


Answer
7.

Name some substances which are made from plastics.


Answer
8.

Select those objects from the following which shine:
Glass bowl, plastic toy, steel spoon, cotton shirt


Answer
9.

Why is water important for our body?


Answer
10.

Metals generally occur in solid state and are hard. Name a metal that exists in liquid state and a metal that is soft and can be cut with knife.


Answer
11.

How can you show that some solids like sugar, salt are soluble in water whereas solids like chalk powder and sand are not soluble in water?


Answer
12.

Match the objects given below with the materials from which they could be made. Remember, an object could be made from more than one material and a given material could be used for making many objects.


Answer
13.

Is a substance which can be compressed soft or hard?


Answer
14.

Is oil soluble in water?


Answer
15.

Which is more hard, sponge or iron?


Answer
16.

Write two gases which are soluble in water.


Answer
17.

What is the reason for grouping materials?


Answer
18.

Make a table of different types of objects that are made from the same material.


Answer
19.

Describe an experiment to prove that water is transparent.


Answer
20.

List three liquids which are transparent.


Answer
21.

Mention some materials which are made up of paper.


Answer
22.

What is the basis for sorting materials?


Answer
23.

Grouping of objects helps the shopkeeper.' Justify the statement.


Answer
24.

Given below are the names of some objects and materials:
 Water, basket ball, orange, sugar, globe, apple and earthen pitcher Group them as:
(a) Round shaped and other shapes
(b) Eatables and non-eatables


Answer
25.

Find the odd one out from the following:
(a) Chair, Bed, Table, Baby, Cupboard
(b) Rose, Jasmine, Boat, Marigold, Lotus
(c) Aluminium, Iron, Copper, Silver, Sand
(d) Sugar, Salt, Sand, Copper sulphate


Answer
26.

Why do we need to group materials? Give one reason.


Answer
27.

Name the naturally occuring hardest substance known.


Answer
28.

Name five objects which can be made from wood.


Answer
29.

Which material is generally used for making pens?Wood, aluminium, plastic, cotton


Answer
30.

Write any four properties of materials.


Answer
31.

Select a lustrous material out of the following substances:


Answer
32.

Name two gases which are insoluble in water.


Answer
33.

Name a non-metal that has lustre.


Answer
34.

Make a table and find out whether the following materials mix with water: Vinegar, Lemon juice, Mustard oil, Coconut oil, Kerosene.


Answer
35.

What is common between salt and sand?


Answer
36.

Write an experiment to show that our palm is translucent.


Answer
37.

List all the items known to you that float on water. Check and see if they will float on an oil or kerosene.


Answer
38.

State whether the statements given below are ‘true' or ‘false'.
(i) Stone is transparent, while glass is opaque.
(ii) A notebook has lustre while eraser does not
(iii) Chalk dissolves in water.
(iv) A piece of wood floats on water.
(v) Sugar does not dissolve in water.
(vi) Oil mixes with water.  
(vii) Sand settles down in water.
(viii) Vinegar dissolves in water.


Answer
39.

Why is water called a universal solvent?


Answer
40.

Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after sometime forming two different layer. Explain why.


Answer
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